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cross bores in sewer lines.

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8K views 33 replies 17 participants last post by  victoryplbaz  
#1 ·
Had a really strange problem today. We have a customer who backs up at least once a week. She has had several rooter companies snake her line over the past year. We were setting the job up to pipeburst her sewer and when I ran the camera down the line low and behold I run into a nice 4 inch gas main! What a disaster that could have been. Has anyone else ran across this situation?
 
#4 ·
A plumber in Hamilton OH about 5 years ago blew a house up augering through a gas line! Not really his fault they had bored it in and he was just opening a sewer and there wasn't all the warnings at that time. He was quick to get everyone out and no one was injured.

They put the warning tags in goofy locations like under a sink at random? Like I look under the 2nd fl master bathroom sink before augering the main? It should be required they put yellow c/o caps or something on?
 
#14 ·
There goes the pipe bursting. :cry:

Typically the utilities that bore through the drain line pay for the repair. Frequently the pay the homeowner and the homeowner pays us when we get the job completed.

Here it is common to find comcast or verizon in the building sewer.
 
#17 ·
Problem was. The cross bore was underneath a set of masonry steps leading to the city walk. It would have been every bit of 10000 to replace the steps not to mention excavate 13 ft. Deep to get to it. Its nice when utility crews work with you to complete the misssion.
 
#19 ·
I just dug up a line that had a phone cable through it. they laid it right through the sewer and broke the top of it, the roots grew and all of a sudden they had an issue, 10 years later! I documented everything very well and they ended up getting a check for the work done.

What amazes me, or not really, roto rooter was out and cabled the drain and gave them an estimate to replace after running the camera. they use a really small cutter because if I cabled it, I would have taken that line out. there was no way to tell a line was in there due to the roots.
 
#24 ·
We had already camerad the sewer. The line was choked with tree roots. Its just like when you have a collapsed line how much can you see on a camera? Most likely water paper and poo. We would never burst a line if was not needed. But when do you call it quits with snaking? 20 times? 30 times? When the line is so deteriated that you have to excavate? We have been in the sewer business for 3 generations. We don't sell something a person doesn't need. It would have costed this lady a whole lot more then the 5000 grand we charged her to excavate 12ft. Deep through the front yard. Through the house walk. Through the city walk. And into the middle of the street. That's after you tore off her 10 wide pedastal porch and cut down the 100 year old oak tree that. Caused the problem. If it wasn't. For a utility locate and good camera/locate work what would have happened? I'm open ears on this one!
 
#25 ·
I'm having a hard time understanding how a 4" gas main came to be on private property.

Utilities are granted a great deal of latitude when it comes to transiting their product thru, over and under privately owned property, but even they have to follow the rules when it comes to providing 'As-Built' records for the conveyance system to the AHJ.

Did you pull a sewer card before you began excavation? If you did, was the presence of the NG service, let alone its size, depth and operating pressure noted on the card?

This all sounds kind of fishy to me.
 
#26 ·
You are correct that utilities are supposed to run in a set easement taken from usually the center of the road. Or right of way plot plan. Just like the titanic was unsinkable! I'm not sure what your excavation experience is if any but if you are foolish enough to rely on an as built that says it all. An as built is just that. A lazy inspector on a cold day ohh how deep was that connection? Did you put stone around that pipe? Enough said. We have been on projects where they have no records of things installed 5 years ago. If your directional drilling down the side of a road and have a tight radius turn are you gonna tell me that sub who is usually working for peanuts is going to say whoops I jumped out of the easement! Do over. Right. We install close to 100,000 ft. Of pipe per year bursting. Boring. Or open trench and the only thing I would trust an as built for is clean up in the porta pot from the one who wrote it.
 
#27 ·
We're talking about a 4" NG service of indeterminate delivered pressure here allegedly run thru private property. Given the the advances in GPS location technology over the past 20 years have you calculated the odds of that happening?

Yeah, pardon my skepticism.
 
#28 ·
Trust me I'm with you. I don't want to come across attacking. We don't experience situations like this daily. I only posted it for others to learn from what we found as I enjoy learning from others on the zone. I can see how this happened {not saying its right}. We had a power main that was bored on top of an 8 inch sewer main and when they pulled the reamer head back hit every bell of pipe. Weird things happen in this business
 
#30 ·
I fixed a half dozen last year. Electric bored thru.

4000 volts. I was kinda pissed when they showed up and told me what it was, after chewing on it for a half hour with the big cutter.

Tell me your sphincter don't pucker up when you see the red pipe on the monitor.
 
#31 ·
There is 6 to 8 inch lines ran through farms with no as built drawings found all the time. There is a transmission line from the southern states travelling through ohio and only half of it is recorded on an as built. Things go in the ground things are forgotten about things are sometimes found. By the way if you read my post we had to burst to the center of the street. There is storm sewer water power and gas in a 25 ft easement. Then along comes the replacement line. Where are you gonna drill?